Replacing The Mower Belt - Toro 39678 Operator's Manual

8. Install the mower belt
9. Check the belt guide under the engine frame for
the proper adjustment
Note:
The distance between the belt guide and
mower belt should be 19 mm (3/4 inch) when
you engage the mower belt. Adjust the belt,
if necessary. The disengaged belt should not
drag or fall off the pulley when the guides are
properly adjusted.

Replacing the Mower Belt

Important:
The brake needs to be adjusted when
the belt tension or the brake linkage is adjusted.
1. Park the machine on a level surface, disengage
the PTO, and engage the parking brake.
2. Shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
3. Remove the knobs and belt cover from the
mower.
4. Remove the idler pulley and worn belt.
5. Install the new mower belt.
6. Install the idler pulley.
7. Engage the PTO and check the belt tension;
refer to Adjusting the Mower Belt Tension (page
37).
Note:
The proper mower belt tension is 44 to
67 N∙m (10 to 15 ft-lb) with the belt deflected
13 mm (1/2 inch) halfway between the pulleys
(Figure 39).
8. Engage the PTO.
9. Check the clearance between the bell crank and
transmission-output shaft
Note:
The clearance should be 2 to 3 mm (1/16
to 1/8 inch).
(Figure 37).
(Figure 37).
(Figure 38).
1. 2 to 3 mm (1/16 to 1/8 inch) 4. Hairpin cotter
2. Bell crank
3. Transmission-output shaft
10. Remove the hairpin cotter and clevis pin from
the bell crank
11. Rotate the clevis clockwise on the rod to increase
the clearance; rotate it counterclockwise to
decrease it (Figure
12. Disengage the PTO.
Note:
If the assist arm does not contact the
front stop on the mower deck
the clevis to bring the bell crank closer to the
transmission-output shaft
1. 13 mm (1/2 inch) deflection
here
2. Assist arm
3. Front stop
13. Check the belt guide under the engine frame for
the proper adjustment
36
Figure 38
5. Clevis pin
6. Clevis
(Figure 38).
38).
(Figure
(Figure 38).
Figure 39
4. Locknut
5. Turnbuckle
(Figure 37).
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39), adjust
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